Doorjamb structure and method of setting doorjambs including stops



Sept. 26, 1961 KRONQUIST 3,001,244

DOORJAMB STRUCTURE AND METHOD OF SETTING DOORJAMBS INCLUDING STOPS Filed Dec. 31, 1956 3 Sheets-Sheet 2 /c 2 f/G...3

1 3 JELI. INVENTOR.

3 ALFRED J mama/5r BY W, m 2' 146M ATTORNEYS r I As Sept. 26, 1961 A. J. KRONQUIST 3,001,244

DOORJAMB STRUCTURE AND METHOD OF SETTING DOORJAMBS INCLUDING STOPS Filed Dec. 31, 1956 3 Sheets-Sheet 3 22- I9 20 WWZWZ/adwf Patented Sept. 26, 1961 United States Patent ce 3,001,244 l v n DOORJAMB STRUCTURE AND METHOD OF SETTING DUORJAMBS INCLUDING STOPS Alfred J. Kroiiquist, 2470Ivanhoe Drive, Les Angeles 29, Calif. Filed Dec. 31, 1956, Ser. No. 631,528 13 Claims. (CI. 20-11) This invention relates generally to doorway structure and more particularly to the setting of doorjambs and to doorjambs, and has for one of its objects the provision of a method of setting doorjarnbs that enables an operator to more accurately and more quickly set doorjambs on a .door opening than heretofore.

Another object of the invention is the provision of a doorway structure in which the lateral sides of the door opening for a doorjamb are provided with means that cooperate with the jamb-sides of the doorjamb for positioning said jamb-sides vertical without requiring the 'shimming of the jamb-sides after they are in the opening.

A still further object of the invention is the provision of a doorjamb thatincludes the door trim and means for accurately setting said doorjamb and trim in the door opening.

Another object of the invention is the provision of means for use in accurately positioning doorjamb setting means in a door opening to insure accurate and rapid positioning of a doorjamb in a door opening.

In explanation of the foregoing, heretofore the making and setting of a doorjamb has involved a long and arduous task. In the conventional procedure the iambsides and jamb-head of each-doorjamb are first made and nailed together outside the door opening after which the doorjamb is positioned within the opening and there after the doorjamb is blocked up to provide for floor clearance. The ,jamb-sides are then plumbed and the jamb-head is levelled by means of shins or thin wedges jammed laterally intothe spaces between the studs and the jam-b-sides.

In each-instance the operator must take care to not wedge the jamb unevenly, and in a proper setting he intermittently uses the level and a straight edge to insure proper plumbing of the jambs without causing unequal wedging. v

By this conventional procedure, after the doorjamb and casing are-made, it -requires an average of forty-five minutes to properly set the jamb and to secure the casing (trim) and to hang the door.

The present method requires only five rninutesto complete the job, or :a saving of approximately forty minutes on each installation. This saving translated into money results in a very substantial saving, and it is therefore an additional object of the invention to provide a structure and method that are more economical than heretofore.

Other objects and advantages will appear in the description and in the drawings.

In the drawings, I

FIG. 1 is a side elevational view of a door opening with the doorjamb setting gauge in position within the opening illustrating the first step in the method.-

FIG. 2 is a side elevational view of the doorjamb positioned within the door opening, and with the trim or casing on the near side of the jamb removed. 7

FIG. 3 is a sectional view taken along line 3--3 of FIG. 2.

FIG. 4 is an enlarged fragmentary part sectional and part elevational view of the upper right hand corner of a doorjamb installation.

FIG. 5 is a sectional view taken along line 5-5 of FIG. 4.

FIG. 6 is an enlarged fragmentary view of the spring urged foot bolt on the gauge.

:In detail, referring to FIG. 1, the door opening has lateral sides that are defined by the opposed surfaces of a pair of studs 1, and the upper side of which is defined by the lower surface of the header 2. The floor, or subfloor 3 defines the lower side of the opening.

The doorjamb setting gauge that may be employed for carrying out the present method, comprises a vertical post '4, and carried by said post are a plurality of horizontally extending arms 5, 6, 7 the lowermost being 5 and the uppermost 7.

Arm 7 is preferably at a point that is seven inches below header 2 while arm 5 is eleven inches from the floor and arm 6 is thirty inches above arm 5, these being approximately the levels of the hinges that support the door in the doorjamb. Said arms extend oppositely outwardly from said post 4 and are of equal length with their outer ends in vertical alignment at opposite sides of said post when said post is vertical.

If desired, a fitting 8 may slidably support each of said arms on said post for vertical movement of said arms relative to each other and to said post to diiferent adjusted positions on said post, and a set screw 9 carried by each fitting may secure each arm in adjusted position. Ordinarily the spacing between the arms will remain as described, hence the adjustment of the arms relative to each other is usually not necessary.

It is not unusual for door openings to be of different widths, hence it is desirable that each of the arms 5, 6, 7 be extensible and collapsible, longitudinally thereof to enable the gauge to be used for different width door openings. One structure for accomplishing this results is to make the arms in telescopically related sections so that the outer sections of each arm will slide in and out of the inner section, and a set screw 11 carried by each inner section 12 may lock the outer sections in ad justed position. As seen in FIG. 1, the outer sections 10 are at both outer ends of each arm, which permits quite widevariation. Normally adjustment of only one of the outer end sections would be necessary, since it does not impair the .efiiciency of the gauge if the post 4 is oflset to one side of the overall length of the arms.

A spirit level 13 may be carried by the post, preferably at about eye level, so the operator can readily position the post vertical to insure vertical alignment of the ends of the arms at each of the opposite sides of the post.

The lower end of post 4- is provided with a spring drop boltf14 that is adapted to engage the floor and which will yieldably support the post at the proper height. The upper end of said post will be slightly short of the header 2 when supported on the spring bolt.

The upper arm 7 carries upstanding standards or uprights 15, 16 adjacent to their outer ends, and standard 16 may carry a laterally outwardly projecting arm 17 at its upper end, which arm 17 extends away from post 4 and terminates at its outer end in a lower corner or joint 18' which defines a critical major point in the method to be described.

The upper-ends of standards 15, 16 and the outer ends of outer arm sections 10 and the outer end of arm 17 may each have a metal tip thereon if said standards, sections and arm are of wood, and the upper end of post 4 may also have a metal tip, to resist Wear and possibility of splintering at said ends.

The studs 1 and header 2 are seldom exactly straight and they may be twisted. Hence a space is always left between the studs 1, header 2 and the jamb-sides and jarnb-head of the doorjamb to permit plumbing the jambsides and positioning the jamb-head horizontal.

In the operation or" setting the doorjamb by the present method, it should be noted that the method enables the installation .of the jamb-sides and jamb-head with the casing or attached thereto.

As seen in FIG. 5 the jamb-side at the right hand side of the door opening as seen in FIG. 2 (both sides have the same structure so the same description is for both) comprises a jamb 18 the width of which is equal to the overall width of the stud 1 and the grounds 19. The opposite edges of this jamb is preferably slanted slightly so that the casing 20 secured to said opposite edges Will extend slightly divergently in direction away from the jamb. This casing is rigidly secured to each jamb-side 18 by nailing or in any other suitable manner so as to be a part of the jamb-side.

The jamb-head 21 is similarly constructed and has a casing 22 secured thereto and extending slantingly therefrom. The header 2 has grounds 23 thereon corresponding to the grounds 19 on the studs.

A door stop 24 may be secured to the inner side of each jamb-side 18 and a similar stop 25 (FIG. 5) secured to the lower side of the jamb-head 21.

The trim or casing sections 20, 22 are cut at 45 angles at their ends to meet when the doorjamb is fitted in the opening.

The opposite upper ends of the jamb-head are each formed with a downwardly opening transverse groove 26 (FIG. 4) adapted to receive a complementarily formed tongue 27 at the upper end of each jamb-side 18 when the angular edges of the trim or casings are in meeting relation.

The jamb-sides 18 including the casing 20 and stop 24 on each, are separately assembled from each other and from the jamb-head 21, trim 22 and stop 25. Thus three separate units are provided, each complete, including a striker plate 28 (FIG. 2) on one of the jamb-sides, and

of the arms and standards will not vary for a uniform doorjamb, and the positions of the shoulders or surface engaging points 31, 33 will not vary if the jambs are made accurately. The door openings may vary but there will always be a space between the doorjamb and the sides of the door opening.

In operation, the gauge is set in the door opening spaced from the sides and tip of said opening, and when the' post 4 is plumbed a wedge 34 is positioned between the upper end of the post and the lower side of the header to secure the post rigid in the opening. The arms 5, 6, 7 are all in the plane of the door opening with their outer ends substantially equally spaced from studs 1, and the upper ends of standards 15, 16 are spaced below the header 2.

Wedges 35 are then positioned from above between the outer ends of arms 5, 6, 7 and the studs 1, and wedges 36 are positioned from the adjacent sides of standards 15, 16 to positions between the upper ends of the standards and the jamb-head, and a wedge 37 is positioned from below between the outer end of arm 17 and the stud 1 that is adjacent thereto. As each wedge is positioned it may be stapled or nailed to the studs or header.

The slanted side of each wedge will engage the corners of the outer ends of arms 5, '6, 7 and the corners of standards 15, 16 and the corner of arm 17 at exactly the points where the shoulders 31, 33 and the lower end corner 18' of jamb-head 21 will be when the doorjamb is in the the hinge plates 29 on the other of said jamb-sides (FIG. I

3). Thus the jamb-head, and jamb-sides, when interlocked at the tongue and groove joints 26, 27 will provide a complete doorjamb, casing, and stop and all that remains is to position the door in the doorjamb and drop the hinge pins in place and the job is done.

Since the doors are normally accurate, the doorjamb elements as above described will preferably be pre-fabricated and pre-assembled except for positioning the jambsides and jamb-head in assembled relation.

It will be obvious that this pre-fabrication and assembly of the casing on each of the jamb-sides and jamb-head would be impossible were present methods employed, since the casings would cover the space heretofore accessible for positioning the shingle shims for plumbing the doorjamb.

The outwardly facing or back sides of the jamb sides 18 are preferably recessed at 30 at points substantially corresponding to the levels of the outer ends of arms 5, 6, 7 so that the juncture between the lower edge of each opening.

Once the wedges are nailed or stapled in place, which is quickly accomplished, the doorjamb setting gauge is quickly removed, which removal is facilitated by the spring bolt 14 enabling the post to be yieldably depressed and swung to the right at the same time to free the gauge arms and standards from the wedges.

The next step is positioning the jamb-headand the parts carried thereby 'below the header so that the right hand end of the jamb-head will engage wedge 37, and the point of engagement will be exactly at point or corner recess and the back'of the jamb side or the shoulder 31 at said juncture (FIG. 4) will be at exactly the same point as the upper outer corner of the outer end of each arm 5, 6, 7.

In the case of the jamb-head, the upper or back side of this head is similarly recessed at 32 so that the shoulders 33 at the opposite outer ends of the pair of recesses 3'2 will be at exactly the same points as the inner corners of the outer ends of standards 15, 16. The recesses 30, 32 actually extend completely across the rear sides of the jamb-sides and jamb-head hence can be accessibly and quickly formed by any conventional cutter.

The lower outer corner of the arm 17 is at exactly the lower level of the jamb-head 21.

From the foregoing, it will be seen that, were the assembled doorjambs positioned alongside the door-jamb setting gauge of FIG. 1 the shoulders 31 would coincide with the upper corners of the outer ends of arms 5, 6, 7 and the shoulders 33 would correspond to the inner corners of standards 15, 16 at their outer ends, and lower corner of. the right hand end of the jamb-head 21 would coincide with the lower corner of arm 17 at the outer end of the latter. Once the gauge is fixed, these corners 18'. The wedges 36 will enter recesses 32 and will engage the shoulders 33. It should be noted that the inclination of the side of recesses 32 and recesses 30 that are adjacent to the slanted outer sides of the wedges have a sharper slant so that a surface line contact is made at 33 and 31. Obviously recesses 31, 33 could be rectangular and the same result would be accomplished, and the structure would be similar, except that the shoulders would be right angle shoulders instead of obtuse angle shoulders.

Once the jamb-head is in the position described above it is quickly nailed in place.

Either of the jamb sides may then be positioned in place, first inserting the tongue 27 in the groove 26 and then swinging the jamb against the wedges 30. The upper end of the right hand jamb-side is recessed at 40 to accommodate wedge 37, and wedge 37 may be relatively narrow or thin as compared with the wedges 35, 36, since the latter are preferably about three inches wide and approximately 2 inches long.

Each jamb-side is quickly nailed in place, and the nailing is preferably at the wedges to extend through the latter.

' The slight divergence of the casing or trim relative to the jamb-sides and jamb-head facilitates sliding the trim over the grounds.

Once the jamb-sides are nailed in place the door may be hung by inserting the hinge pins and the job of hanging the door is completed. Absolute accuracy is made possible by the present method and structure, and at a saving of approximately forty minutes for each door. Since the doorjamb, casing and door stops may all be made up and assembled in a shop remote from the actual door opening, the saving is substantially greater and E tive of the invention, since it is the intention that the invention cover all changes and modifications of the example of the invention herein chosen for purposes of the disclosure, which do not depart from the spirit and scope of the invention.

I claim:

1. The method of installing a doorjamb having jambsides and a jamb head and the door trim for said doorjamb in a door opening in which the lateral sides of said opening are defined by the opposedly facing surfaces of a pair of studs and the upper side of which opening is defined by the lower surface of a header that comprises the steps of; pre-fixing vertically spaced side-jamb engaging surfaces spaced within said opening along saidopposed surfaces rigid with the latter and with said jambside engaging surfaces aligned along vertical lines, prefixing horizontally spaced jamb-head engaging surfaces spaced within said opening along said lower surface rigid therewith and aligned along a horizontal line extending between the upper end portions of said opposed surfaces, securing the door trim to the jamb-sides and j-amb-head of said doorjamb and thereafter insertingsaid jamb-head into said opening and securing it rigidly against said jamb-head engaging surfaces with the door trim on said jamb-head extending over opposite lateral sides of said header, then inserting said jamb-sides into said opening and securing them rigidly against said jamb-side engaging members with the door trim on said jamb-sides extending over opposite sides of said studs.

1 2. In doorway structure that includes a pair of spaced building studs having opposed sides defining the lateral sides of a door opening and having a horizontally extending header the lower side of which defines the upper side of said opening; spaced means carried by and rigid with said studs projecting into said opening and disposed wholly within the laterally projected, confines of the outlines of said studs in direction across said opening, each of said means having a planar surface extending slantingly relative to vertical and to each stud into said opening, a doorjamb spaced Within said opening having jambsides respectively adjacent to each of said studs, separate means on each of said doorjambs disposed along a line parallel with its longitudinal axis respectively in horizontally extending single line contact with the planar surface on each of the spaced means carried by the stud adjacent thereto, the lines of engagement between said planar surfaces'and said separate means being in a vertical row along each stud for positioning said jamb-sides vertical irrespective of variations in the longitudinal contour of the studs.

3. In a doorway structure that includes a pair of spaced building studs having opposed sides defining the lateral sides of a door opening and having a horizontally extending header the lower side of which defines the upper side of said opening; spaced means carried by and rigid with said header projecting into said opening and disposed wholly within the downwardly projected confines of the outline of said header, each of said means having a planar surface extending slantingly relative to horizontal in a direction longitudinally of said header from said header into said opening, a doorjamb spaced within said opening having a jamb-head spaced below and adjacent to said header, separate means on said jamb-head disposed along a line parallel with its longitudinal axis respectively in single line engagement with said planar surface on each of said spaced means along a line extending transversely of said header, the lines of engagement between said planar surfaces and said separate means being in a horizontal row for positioning said jamb-head horizontal below said header irrespective of variations in the longitudinal contour of the latter.

' 4. In doorway structure that includes a pair of spaced studs having opposed sides defining the lateral sides of a door opening and having a horizontally extending header the lower side of which defines the upper side of said opening; means carried by said studs and by said header projecting into said opening for engagement with the jam-b-sides and jamb-head of a doorjamb adapted to be within said opening for positioning said jamb-sides vertical and said jamb-head horizontal, said means being spaced members each having a side extending angularly into said opening, and a doorjamb within said opening having jamb-sides and a jamb-head extending across the members on said studs and header respectively, recesses formed in the outer sides of said jamb-sides and said jamb-head into which the members on said studs and header project and the juncture between the outer facesof said jamb-sides and said jamb-head respectively and one side of the recess in which one of said members is positioned being in single line engagement only with the angularly extending side of such one of said members at a point therealong.

5. Incombination with a pair of spaced studs, and a header that define the lateral sides and upper side of a door opening, a plurality of vertically spaced wedges within said opening secured to the inwardly facing sides of said studs with the widest part of each wedge uppermost, and with the surface of each wedge that faces generaillyjinto said opening extending slantingly upwardly into said opening from the lower end of each wedge, a doorjamb within said opening having a jarnb-side along eachstud extending longitudinally thereof, means independentlyof said doorjamb securing said. wedges stationary and rigid with said studs, the side of each jamb-side facing the stud adjacent thereto being provided with a plurality of shoulders, each shoulder being opposite each wedge and in single line engagement with said slanted surface of each Wedge along a single line only extending transversely of each stud across said surface, the lines of engagement between said shoulders and said slanted surfaces being in a vertical row on each stud and said shoulders on each jam'b-side being along a line parallel with the longitudinal axis of each jamb-side.

6. In combination with a pair of spaced studs, and a header that define the lateral sides and upper side of a door opening, a plurality of vertically spaced wedges within said opening secured to the inwardly facing sides of said studs with the widest part of each wedge uppermost, and with the surface "of each wedge that faces generally into said opening extending slantingly upwardly into said opening from the lower end of each wedge, a doorjamb within said opening having a jamb-side along each stud extending longitudinally thereof, means independently of said doorjamb securing said wedges stationany and rigid with said studs, the side of each janrb-side facing the stud adjacent thereto being provided with a plurality of shoulders, each shoulder being opposite each wedge and in single line engagement with said slanted surface of each wedge along a single line only extending transversely of each'stud across said surface, the lines of engagement between said shoulders and said slanted surfaces being in a vertical row on each stud and said shoulders on each jamb-side being along a line parallel with the longitudinal axis of each jamb-side, said jambsides being spaced from said studs, and a pair of strips carried by and rigid with each of said jamb-sides extending across the space between each jamb-side and the stud adjacent thereto whereby said wedges will be enclosed by said jamb-sides, studs and strips.

7. In doorway structure that includes a pair of horizontally spaced, vertically extending building studs and a horizontally extending header and floor respectively extending between the upper and lower ends of said studs defining the lateral sides, top and bottom of a door opening in a building frame; a door frame spaced within said door opening including a pair of vertical doorjambs respectively alongside and adjacent to each of said studs, vertically spaced pairs of means respectively on each .doorjamb and on the stud adjacent thereto in horizontally extending single line contact only supporting said doorjambs vertical, each of said pairs of means comprising a stationary wedge member having a wedge surface extending slantingly relative to vertical into the space between each doorjamb and the stud adjacent thereto and the other of each pair of means being a corner portion defining a corner extending horizontally across the said wedge surface on said one of said means and in said single line contact therewith.

8. In doorway structure that includes a pair of horizontally spaced, vertically extending building studs and a horizontally extending header and floor respectively extending between the upper and lower ends of said studs defining the lateral sides, top and bottom of a door opening in a building frame; a door frame spaced within said door opening including a pair of vertical doorjambs re spectively alongside and adjacent to each of said studs, vertically spaced pairs of means respectively on each doorjamb and on the stud adjacent thereto in horizontally extending single line contact only supporting said doorjambs vertical, each of said pairs of means comprising a stationary wedge member having a wedge surface extending slantingly relative to vertical into the space between each doorjarnb and the stud adjacent thereto and the other of each pair of means being a corner portion defining a corner extending horizontally across the said wedge surface on said one of said means and in said single line contact therewith, said wedge members being rigidly secured to said studs on the sides of the latter that face into said opening and said corner portions being formedon the sides of said doorjambs that face the studs respectively adjacent thereto.

9. The method of setting a doorjamb having opposed, vertical jamb sides and a jambhead, in a door opening the lateral sides of which are defined by the opposedly facing surfaces of a pair of studs and the upper side of which is defined by the lower surface of a header, that comprises the steps of: positioning a frame within said door opening having projections directed toward said studs and header at predetermined critical points corresponding to points along said jamb sides and said header when said jamb sides are vertical and when said header is horizontal and are positioned within said door open ing in door receiving position, then securing blocks to said studs and to said header in engagement with said projections at said points, thereafter removing said frame and replacing it with said jamb-sides and said jamb-head in positions engaging said blocks at said points whereby said jamb-sides will be vertical and said jamb-head horizontal irrespective of variations in said studs and header, and securing said jamb-sides and said jamb-head against said blocks at said points.

10. In doorway structure that includes a pair of spaced studs defining the lateral sides of a door opening and having a horizontally extending header defining the upper side of said opening, a horizontally elongated and substantially horizontally disposed jambhead for a door- 1 jamb spaced below said header extending longitudinally thereof and spaced between the upper ends of said studs, said jambhead being adapted to be nailed to said header when level for subsequent securement of jamb sides thereto, means between said header and said jambhead engaging them and restraining said jambhead to tilting oppositely relative to horizontal upon said jambhead being moved toward one stud or the other, and means rigid with one of said studs positioned to engage said jambhead and to hold it against further movement toward said one of said studs for nailing said jambhead to said header at the point in the longitudinal movement of said jambhead when it is horizontal.

11. In doorway structure that includes a pair of spaced studs defining the lateral sides of a door opening and having a horizontally extending header defining the up- I per side of said opening, a horizontally elongated and substantially horizontally disposed jambhead for a doorjamb spaced below said header extending longitudinally thereof and spaced between. the upper ends of said studs,

said jambhead being adapted to'be nailed to said-header when level for subsequent securement of jamb sides thereto, means between said header and said jambhead engaging them and restraining said jambhead to tilting oppositely relative to horizontal upon said jambhead being moved toward one stud or the other, and means rigid with one of said studs postitioned to engage said jambhead and to hold it against further movement toward said one of said studs for nailing said jambhead to said header at the point in the longitudinal movement of said jambhead when it is horizontal, a pair of jamb sides, means respectively at the ends of said jambhead and at the upper ends of said jamb sides in pivotal interengaging relation for swinging said jamb sides from divergently upwardly extending relation with their upper ends in said interengaging relation to vertical position adjacent to said studs, and stationary rigid means between said studs and said jamb sides carried by said studs engageable with said jamb sides at spaced points therealong engageable'with said jamb sides for preventing swinging of said jamb sides past vertical and for spacing said jamb sides from said studs upon nailing said jamb sides to said studs. a

' 12. In doorway structure that includes a pair of spaced studs defining the lateral sides of a door opening and having a horizontally extending header defining the upper side of said opening, a horizontally elongated and substantially horizontally disposed jambhead for a doorjamb spaced below said header extending longitudinally there.- of and spaced between the upper ends of said studs, said jambhead being adapted to be nailed to said header when level for subsequent securement of jamb sides thereto, means between said header and said jambhead engaging them and restraining said jambhead to tilting oppositely relative to horizontal upon said jambhead being moved toward one stud or the other, and means rigid with one of said studs positioned to engage said jambhead and to hold it against further movement toward said one of said studs for nailing said jambhead to said header at the point in the longitudinal movement of said jambhead when it is horizontal, a pair of jamb sides, means respectively at the ends of said jambhead and at the upper ends of said jamb sides in pivotal interengaging relation for swinging said jamb sides from divergently upwardly extending relation with their upper ends in said interengaging relation to vertical position adjacent to said studs, and stationary rigid means between said studs and said jamb sides carried by said studs engageable with said jamb sides at spaced points therealong engageable with said jamb sides for preventing swinging of said jamb sides past vertical and for spacing said jamb sides from said studs upon nailing said jamb sides to said studs, said means between said studs and said jamb sides comprising wedges having planar wedge faces slanted relative to vertical and said jamb sides having recesses within which said wedges project, and one side of each recess at its open side having a horizontal shoulder in line engagement with the wedge face of each wedge.

13. In a doorway structure that comprises a pair of frames disposed one within the other providing an outer frame and an inner frame, said outer frame comprising a pair of spaced opposed vertically extending studs defining the lateral sides thereof and a horizontally extending header extending between the upper ends of said frame defining the upper side thereof, said inner frame comprising a horizontally extending doorhead spaced below said header in opposed relation thereto defining the upper side thereof and a pair of vertically extending doorjambs between and respectively alongside said studs in spaced opposed relation thereto defining the lateral sides thereof and of a door opening, spaced means carried by and rigid with the lateral sides of one of said frames disposed wholly within the laterally projected confines of the outline of said lateral sides and Within the outer frame, each of said means having a planar Suri- 10 face extending slantingly relative to vertical, separate References Cited in the file of this patent means on the other frame of said pair disposed along lines parallel with the longitudinal axis of its lateral sides UNITED STATES PATENTS respectively in horizontally extending single line contact 1,703,557 St r Apr, 9, 1929 with the planar surface on each of the said spaced 5 1,946,961 Bl d Feb, 13, 1934 means, the lines of engagement between said planar sur- 2,316,425 Hasenberger t 1, A 13, 1943 faces and said separate means being in a vertical row 2,651,314 L t Sept, 15, 1953 along the adjacent lateral sides of said inner and outer 2,753,602 Ringle July 10, 1956 frames at each of the sides of said door opening for 2,771,638 B k N 27, 1956 positioning said doorjambs vertical irrespective of varia- 10 ,3 5,050 Pafljani 23, 195

tions in the longitudinal contour of said studs. 

